OCX - Label flashes when BackStyle = 0 (Transparent)

Hi,

I'm developing a simple OCX with only a Label inside of it.
I need to let the Label.BackStyle = 0 (Transparent), but when I do this, the Label caption stays flashing. I think it's because the paint event is being called continuously.
How can I let the Label transparent without flashing?
Is there any property that I need to set up?

Thanks a lot for any help...

Michel Jr.